What Is a Percentage Calculator?
A Percentage Calculator is a free online tool that helps you perform different percentage-related calculations quickly and accurately. It can calculate a percentage of a number, find what percentage one number is of another, calculate percentage change, and increase or decrease a value by a percentage.
Percentage calculations are commonly used in education, competitive examinations, shopping, finance, business, taxation, salary calculations, discounts, profit and loss, data analysis, and everyday life.
Instead of calculating manually, select the required calculation type, enter the values, and click the calculation button to get an instant result.
How to Use the Percentage Calculator
- Select the percentage calculation type.
- Enter the required percentage and number values.
- Click the Calculate button.
- View the result and calculation formula.
- Use the Reset button to perform another calculation.
Percentage Calculation Formulas
| Calculation | Formula |
|---|---|
| Percentage of a Number | Result = Percentage × Number ÷ 100 |
| What Percentage Is X of Y? | Percentage = X ÷ Y × 100 |
| Percentage Increase | Increase % = (New Value − Original Value) ÷ Original Value × 100 |
| Percentage Decrease | Decrease % = (Original Value − New Value) ÷ Original Value × 100 |
| Percentage Difference | Difference % = |Value 1 − Value 2| ÷ Average of Both Values × 100 |
| Add Percentage | Final Value = Original Value + Percentage Amount |
| Subtract Percentage | Final Value = Original Value − Percentage Amount |
How to Calculate a Percentage of a Number
To calculate a percentage of a number, multiply the number by the percentage and divide the result by 100.
20 × 500 ÷ 100 = 100
Therefore, 20 percent of 500 is 100.
How to Calculate Marks Percentage
Students can calculate their examination percentage by dividing the obtained marks by the total marks and multiplying the result by 100.
450 ÷ 500 × 100 = 90%
Therefore, the student's marks percentage is 90 percent.
This calculation can be used for school examinations, college results, competitive exam scores, admission forms, scholarship applications, and academic records.
How to Calculate Percentage Increase
Percentage increase shows how much a value has increased compared with its original value.
Increase = ₹30,000 − ₹25,000 = ₹5,000
Percentage increase = ₹5,000 ÷ ₹25,000 × 100 = 20%
Therefore, the salary increased by 20 percent.
How to Calculate Percentage Decrease
Percentage decrease shows how much a value has reduced compared with its original value.
Decrease = ₹2,000 − ₹1,600 = ₹400
Percentage decrease = ₹400 ÷ ₹2,000 × 100 = 20%
Therefore, the product price decreased by 20 percent.
Percentage Calculator for Discounts
Percentage calculations are frequently used to calculate discounts during online and offline shopping.
Discount amount = ₹1,500 × 25 ÷ 100 = ₹375
Final price = ₹1,500 − ₹375 = ₹1,125
You can use the Subtract Percentage option in the calculator to find the final price directly.
Percentage Difference vs Percentage Change
Percentage change is used when one value is treated as the original value and another value is treated as the new value. It shows an increase or decrease from the original value.
Percentage difference is used when comparing two independent values and neither value is considered the original. It divides the absolute difference by the average of both values.
| Method | Use |
|---|---|
| Percentage Change | Used when comparing a new value with an original value. |
| Percentage Difference | Used when comparing two independent values. |
Main Features of This Calculator
Basic Percentage
Calculate any percentage of a number, such as 15% of 2,000.
Percentage Ratio
Find what percentage one number represents of another number.
Percentage Increase
Calculate the percentage increase from an original value to a new value.
Percentage Decrease
Calculate the percentage decrease between an original and a reduced value.
Percentage Difference
Compare the percentage difference between two independent values.
Add or Subtract Percentage
Increase or reduce a value by a selected percentage.
Where Can You Use Percentage Calculations?
- School and college marks
- Competitive examination scores
- Discounts and shopping offers
- Salary increases and deductions
- Profit and loss calculations
- Loan and interest comparisons
- Tax and GST calculations
- Business growth analysis
- Population and statistical data
- Attendance percentage
- Survey and election results
- Investment performance
Why Use an Online Percentage Calculator?
Percentage calculations may look simple, but mistakes can occur when working with decimal numbers, large values, or percentage changes.
An online calculator saves time, reduces manual errors, and displays both the result and the formula used in the calculation. It is useful for students, teachers, candidates, employees, shopkeepers, business owners, and general users.